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path: root/drivers/iio/accel/adxl372.c
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2021-05-17iio: core: move @id from struct iio_dev to struct iio_dev_opaqueJonathan Cameron1-2/+2
Continuing from Alexandru Ardelean's introduction of the split between driver modifiable fields and those that should only be set by the core. This could have been done in two steps to make the actual move after introducing iio_device_id() but there seemed limited point to that given how mechanical the majority of the patch is. Includes fixup from Alex for missing mxs-lradc-adc conversion. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com> Link: https://lore.kernel.org/r/20210426174911.397061-2-jic23@kernel.org
2021-03-25iio: fix devm_iio_trigger_alloc with parent.cocciGwendal Grignou1-2/+0
Use cocci semantic patch: @@ expression trigger, P; @@ trigger = devm_iio_trigger_alloc(P, ...); ... - trigger->dev.parent = P; To remove trigger->dev.parent, since it is set by default. Signed-off-by: Gwendal Grignou <gwendal@chromium.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20210309193620.2176163-3-gwendal@chromium.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-11-21iio: accel: adxl372: use devm_iio_triggered_buffer_setup_ext()Alexandru Ardelean1-6/+5
This change switches to the new devm_iio_triggered_buffer_setup_ext() function and removes the iio_buffer_set_attrs() call, for assigning the HW FIFO attributes to the buffer. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20200929125949.69934-5-alexandru.ardelean@analog.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-09-03iio: accel: adxl372: Add support for FIFO peak modeStefan Popa1-12/+299
By default, if all three channels (x, y, z) are enabled, sample sets of concurrent 3-axis data is stored in the FIFO. This patch adds the option to configure the FIFO to store peak acceleration (x, y and z) of every over-threshold event. When pushing to iio buffer we push only enabled axis data. Currently the driver configures adxl372 to work in loop mode. The inactivity and activity timings decide how fast the chip will loop through the awake and waiting states and the thresholds on x,y,z axis decide when activity or inactivity will be detected. This patch adds standard events sysfs entries for the inactivity and activity timings: thresh_falling_period/thresh_rising_period and for the in_accel_x_thresh_falling/rising_value. Signed-off-by: Stefan Popa <stefan.popa@analog.com> Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com> Link: https://lore.kernel.org/r/20200810093257.65929-2-alexandru.tachici@analog.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-06-20iio: Move attach/detach of the poll func to the coreLars-Peter Clausen1-15/+5
All devices using a triggered buffer need to attach and detach the trigger to the device in order to properly work. Instead of doing this in each and every driver by hand move this into the core. At this point in time, all drivers should have been resolved to attach/detach the poll-function in the same order. This patch removes all explicit calls of iio_triggered_buffer_postenable() & iio_triggered_buffer_predisable() in all drivers, since the core handles now the pollfunc attach/detach. The more peculiar change is for the 'at91-sama5d2_adc' driver, since it's not immediately obvious that removing the hooks doesn't break anything. Eugen was able to test on at91-sama5d2-adc driver, sama5d2-xplained board. All seems to be fine. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Tested-by: Eugen Hristev <eugen.hristev@microchip.com> #for at91-sama5d2-adc Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-06-14iio: remove explicit IIO device parent assignmentAlexandru Ardelean1-1/+0
This patch applies the semantic patch: @@ expression I, P, SP; @@ I = devm_iio_device_alloc(P, SP); ... - I->dev.parent = P; It updates 302 files and does 307 deletions. This semantic patch also removes some comments like '/* Establish that the iio_dev is a child of the i2c device */' But this is is only done in case where the block is left empty. The patch does not seem to cover all cases. It looks like in some cases a different variable is used in some cases to assign the parent, but it points to the same reference. In other cases, the block covered by ... may be just too big to be covered by the semantic patch. However, this looks pretty good as well, as it does cover a big bulk of the drivers that should remove the parent assignment. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-03-08iio: accel: adxl372: Set iio_chan BEAlexandru Tachici1-0/+1
Data stored in the iio-buffer is BE and this should be specified in the iio_chan_spec struct. Fixes: f4f55ce38e5f8 ("iio:adxl372: Add FIFO and interrupts support") Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-10-09iio: accel: adxl372: Perform a reset at start upStefan Popa1-0/+8
We need to perform a reset a start up to make sure that the chip is in a consistent state. This reset also disables all the interrupts which should only be enabled together with the iio buffer. Not doing this, was sometimes causing unwanted interrupts to trigger. Signed-off-by: Stefan Popa <stefan.popa@analog.com> Fixes: f4f55ce38e5f ("iio:adxl372: Add FIFO and interrupts support") Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-10-09iio: accel: adxl372: Fix push to buffers lost samplesStefan Popa1-2/+1
One in two sample sets was lost by multiplying fifo_set_size with sizeof(u16). Also, the double number of available samples were pushed to the iio buffers. Signed-off-by: Stefan Popa <stefan.popa@analog.com> Fixes: f4f55ce38e5f ("iio:adxl372: Add FIFO and interrupts support") Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-10-09iio: accel: adxl372: Fix/remove limitation for FIFO samplesStefan Popa1-3/+8
Currently, the driver sets the FIFO_SAMPLES register with the number of sample sets (maximum of 170 for 3 axis data, 256 for 2-axis and 512 for single axis). However, the FIFO_SAMPLES register should store the number of samples, regardless of how the FIFO format is configured. Signed-off-by: Stefan Popa <stefan.popa@analog.com> Fixes: f4f55ce38e5f ("iio:adxl372: Add FIFO and interrupts support") Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-06-17iio: adxl372: fix iio_triggered_buffer_{pre,post}enable positionsAlexandru Ardelean1-11/+16
The iio_triggered_buffer_{predisable,postenable} functions attach/detach the poll functions. For the predisable hook, the disable code should occur before detaching the poll func, and for the postenable hook, the poll func should be attached before the enable code. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-09-08iio: adxl372: Add support for I2C communicationStefan Popa1-1/+0
The adxl372 is designed to communicate in either SPI or I2C protocol. It autodetects the format being used, requiring no configuration control to select the format. Signed-off-by: Stefan Popa <stefan.popa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-09-08iio: adxl372: Refactor the driverStefan Popa1-48/+25
This patch restructures the existing adxl372 driver by adding a module for SPI and a header file, while the baseline module deals with the chip-logic. This is a necessary step, as this driver should support in the future a similar device which differs only in the type of interface used (I2C instead of SPI). Signed-off-by: Stefan Popa <stefan.popa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-08-25iio:adxl372: Add filter bandwidth supportStefan Popa1-2/+36
This patch adds the option for the user to select the filter bandwidth. The user can also read the available bandwidths which are always adjusted to be at most half of the sampling frequency. Furthermore, the currently selected bandwidth can be read via the read_raw function, while the write_raw sets a new bandwidth value. Signed-off-by: Stefan Popa <stefan.popa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-08-25iio:adxl372: Add sampling frequency supportStefan Popa1-1/+73
This patch adds the option for the user to select the sampling frequency. Also, the user can read the available frequencies and read the currently set frequency via the read_raw function. The frequency can be set via the write_raw function. When the frequency is set, the bandwidth is also checked and ensured that it is constrained to at most half of the sampling frequency. Also, the activity and inactivity timers have to be updated because they depend on the selected ODR. Signed-off-by: Stefan Popa <stefan.popa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-08-25iio: adxl372: Provide validate_trigger and validate_device callbacksStefan Popa1-0/+13
This patch provides a validate_device callback for the trigger which makes sure that other devices are rejected. Signed-off-by: Stefan Popa <stefan.popa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-08-19iio:adxl372: Add FIFO and interrupts supportStefan Popa1-1/+356
This patch adds support for the adxl372 FIFO. In order to accomplish this, triggered buffers were used. The number of FIFO samples which trigger the watermark interrupt can be configured by using the buffer watermark. The FIFO format is determined by configuring the scan elements for each axis. The FIFO data is pushed to the IIO device's buffer. Signed-off-by: Stefan Popa <stefan.popa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-08-19iio: adxl372: New driver for Analog Devices ADXL372 AccelerometerStefan Popa1-0/+525
This patch adds basic support for Analog Devices ADXL372 SPI-Bus Three-Axis Digital Accelerometer. The device is probed and configured the with some initial default values. With this basic driver, it is possible to read raw acceleration data. Datasheet: http://www.analog.com/media/en/technical-documentation/data-sheets/ADXL372.pdf Signed-off-by: Stefan Popa <stefan.popa@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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